A223209 - OEIS

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A223209 as a triangular array

1

3 3

9 15 9

27 75 75 27

81 375 657 375 81

243 1875 5763 5763 1875 243

729 9375 50553 90111 50553 9375 729

2187 46875 443451 1412907 1412907 443451 46875 2187

6561 234375 3889953 22163655 39868737 22163655

A223209 as a square array

`1`	`3`	`9`	`27`	`81`	`243`	`729`	`2187`	`6561`
`3`	`15`	`75`	`375`	`1875`	`9375`	`46875`	`234375`
`9`	`75`	`657`	`5763`	`50553`	`443451`	`3889953`
`27`	`375`	`5763`	`90111`	`1412907`	`22163655`
`81`	`1875`	`50553`	`1412907`	`39868737`
`243`	`9375`	`443451`	`22163655`
`729`	`46875`
`2187`

A223209 as an upper right triangle

`1`	`3`	`9`	`27`	`81`	`243`	`729`	`2187`	`6561`
	`3`	`15`	`75`	`375`	`1875`	`9375`	`46875`	`234375`
		`9`	`75`	`657`	`5763`	`50553`	`443451`	`3889953`
			`27`	`375`	`5763`	`90111`	`1412907`	`22163655`
				`81`	`1875`	`50553`	`1412907`	`39868737`
					`243`	`9375`	`443451`	`22163655`
						`729`	`46875`
							`2187`

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Last modified August 13 09:19 EDT 2024. Contains 375130 sequences. (Running on oeis4.)